Can someone explain to me how the following address can have a class "C" subnet mask (IP addr: 10.203.57.1). Jon L. Miller, MCNE ASE MMT Networks Pty Ltd Ph:+61.8.9402.0639 Fx:+61.8.9402.2492 HP:http://www.wantree.com.au/~jlmiller EM:mailto:jlmiller at wantree.com.au